[Healeys] Master Cylinder Packing Shims

Perry Small healeyguy at aol.com
Tue Nov 9 14:12:13 MST 2021

The addition of the 1/16 inch thick packing “piece” or shim at the master cylinder mounting will lower the brake pedal pad approximately 1/4 inch when the pedal is released. Two shims stacked changes it by 1/2 inch. 

Sent from my iPhone

> On Nov 9, 2021, at 2:32 PM, Simon Lachlan via Healeys <healeys at autox.team.net> wrote:
> Certainly 4 are shown in my parts book, so suitable for MkIIs. Shaped and show as a fit between cylinder and bulkhead.
> Surely the fact there are 4 indicates that they are indeed meant as some form of adjustment shim.
> In my drawer of brake and clutch related “useful stuff” there was an apparently unused brake master cylinder with an adjustable push rod. The shaft’s rod was threaded and screwed in and out of the clevis pin end and could be locked with a nut.
> Perhaps the cheap(er) shims replaced the more expensive cylinder?
> Adjusting the shaft in situ would be an absolute nightmare for anyone who wasn’t whippet thin and possessed of short arms with many joints.
> Simon
> From: Healeys <healeys-bounces at autox.team.net> On Behalf Of Harold Manifold via Healeys
> Sent: 09 November 2021 16:56
> To: Ken Fleming via Healeys <healeys at autox.team.net>
> Subject: [Healeys] Master Cylinder Packing Shims
> Who knows what the purpose of the Master Cylinder Packing Piece is? There are 4 on the brake master cylinder and none on the clutch master cylinder. As far as I can tell the packing piece would reduce the distance the push rod can travel into the bore of the master cylinder. Is there an adjustment for the brake pedal and push rod that you use these packing pieces to set?
> The workshop manual specifically mentions “not forgetting to fit the packing washer first” as part of the brake master cylinder installation.
> <image001.jpg>
> Thanks… Harold
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